diff --git a/src/buffer.c b/src/buffer.c
index d16b17160..5d54ee1a5 100644
--- a/src/buffer.c
+++ b/src/buffer.c
@@ -172,6 +172,8 @@ int git_buf_puts_escaped(
 		}
 	}
 
+	buf->ptr[buf->size] = '\0';
+
 	return 0;
 }